CN1222426A - Sinter molding flux for submerged-arc welding and its manufacture - Google Patents
Sinter molding flux for submerged-arc welding and its manufacture Download PDFInfo
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- CN1222426A CN1222426A CN 98125059 CN98125059A CN1222426A CN 1222426 A CN1222426 A CN 1222426A CN 98125059 CN98125059 CN 98125059 CN 98125059 A CN98125059 A CN 98125059A CN 1222426 A CN1222426 A CN 1222426A
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Abstract
The invention provides a burning type flux with excellent moisture absorption resistance. Woalding using the same, it can obtain a weld metal with small diffusible hydrogen, and can reduce the appearance of crack generated by hydrogen in the weld. The mottling is prevented even if the welding slag is reuse repeatly, woalding using the flux. A suitable CO, CO2 can be generated when woalding using the flux to reduce the content of nitrogen in the weld metal, accordingly the dent is prevented.
Description
The sinter molding flux of the submerged-arc welding of being adopted when the present invention relates to weld steel construction objects such as structure in boats and ships, the ocean, storage tank, iron and steel framework, bridge, the particularly sinter molding flux of anti-good hygroscopicity.
The used solder flux of submerged-arc welding is with silica (SiO
2) be main body, add manganese oxide (MnO, Mn again
3O
4), calcium oxide (CaO), aluminium oxide (Al
2O
3) and their other oxide, fluoride etc. make for raw material.
According to its manufacture method, the used solder flux of submerged-arc welding is divided into fusion solder flux, mixed type solder flux, sinter molding flux.
The fusion solder flux is that raw material is fused in calciners such as electric stove, pulverizes again after the cooling to be the particle of suitable granularity, the formation solder flux.Therefore main equipment must be arranged, bring the manufacturing scale to increase, the shortcoming that manufacturing cost rises.
The mixed type solder flux is to form with the raw material manufacturing different with composition of traditional mechanical mixture shape of particle.This mixed type solder flux must be adjusted granularity, the bulk density of raw material, if do not carry out above-mentioned adjustment, can cause the segregation of solder flux raw material when weld scatters solder flux, the slag that the generates during welding heterogeneity that becomes, and generation can not be stablized the problem of welding.
On the other hand, sinter molding flux generally is to add as the sodium metasilicate of adhesive in solder flux raw meal such as oxide and fluoride etc., forms through mixing, granulation, drying, firing process manufacturing.Seldom adhesive is saved.
Because this sinter molding flux can be with fairly simple device fabrication, thereby very cheap, and can add deoxidier and alloying element, has the advantage of the composition that can adjust weld metal.
1) still, the same with the mixed type solder flux, raw material makes the quality of sinter molding flux or the characteristic of weld metal, and great changes will take place.For example, to contain the hygroscopicity of moisture such as the crystallization water or raw material very big to the influence of hydrogeneous in the weld metal (diffusible hydrogen) amount for raw material.The content of the diffusible hydrogen in the weld metal becomes the reason that produces hydrogen induced cracking in the welding.
Therefore, in order to reduce the content of diffusible hydrogen in the metal that adopts the sinter molding flux welding, now the whole bag of tricks is in the past studied.
For example, in special permission communique clear 51-16172 number, special permission communique clear 52-25819 number, special permission communique clear 56-8717 number, special permission communique clear 56-53476 number and the special permission communique clear 58-49356 number the ratio that increases the carbonate in the solder flux is disclosed, the CO that takes place during with welding
2Gas reduces H
2Dividing potential drop, thereby prevent the method that hydrogen spreads in weld metal.
But in said method, the CO that carbonate decomposition takes place
2Gas makes the welding bead rough surface, and the problem that can bring operating characteristics to worsen when high-speed welding.
In addition, for example, propose among the clear 51-25809 of special permission communique, the lithium metasilicate aqueous solution of use agent of low hygroscopicity or the waterglass that lithium metasilicate has been added in use are as adhesive, to reduce the hygroscopic method of adhesive.
But because lithium metasilicate is very expensive, can cause the cost of solder flux to increase, therefore not be suitable for common solder flux at present.
Submerged-arc welding is to scatter solder flux in advance on the surface of weld part, gives exposed welding wire therein, and with the method for welding, its feature is that a large amount of solder flux must be arranged.The part of solder flux is constant, can supply recycling, and another part burns totally, and some is used for and the weld metal chemically reactive, forms slag.
In the past, the slag of submerged arc Produced after Welding (hereinafter referred to as the submerged-arc welding slag, or only being called slag) has been discarded as trade waste, but also residual in its slag have a considerable flux constituent, from the viewpoint of resources effective utilization, the utilization again of the slag that begins one's study recently.
For example, openly specially permit the clear 57-181796 of communique, openly specially permit among the flat 7-227694 of communique untapped solder flux etc., the method for utilizing again of proposing to mix in the slag.
But these methods have been stipulated mixed proportion, the granularity of mixed type solder flux, to not research of sinter molding flux.
As the technology of in the raw material of sinter molding flux, utilizing slag, openly specially permit in the clear 51-21537 of communique number and put down in writing, the generating capacity of the generation gas CO gas when welding for reducing reclaims slag, through deferrization pulverizing, granularity adjusting, composition adjustment, make the used sinter molding flux of submerged-arc welding.
The generating capacity of the generation gas CO gas when though the technology of putting down in writing in the above-mentioned communique has reduced welding, but, do not put down in writing in the above-mentioned communique and make the necessary every actual conditions of sinter molding flux, differ and reduce the content of diffusible hydrogen in the weld metal surely with the submerged-arc welding slag.
2) inventor finds, if utilize the slag of submerged-arc welding repeatedly again, is easy to generate the weld defect that is called as pit, and the solder flux that utilizes the submerged-arc welding slag must be the solder flux with outstanding anti-pit.
3) and, the inventor finds, utilizes the solder flux of submerged-arc welding slag, in the unsettled places of welding arc such as welding beginning portion, tack weld portions, the nitrogen content in the weld metal increases, and is easy to generate indenture in the weld metal.
The objective of the invention is to, solve above-mentioned 1)～3) in the problem that exists of prior art, can reduce the diffusion of hydrogen in weld metal, provide the superior submerged-arc welding of a kind of anti-moisture pick-up properties used sinter molding flux and manufacture method thereof, and the present invention also aims to provide a kind of anti-pit, used sinter molding flux and the manufacture method thereof of submerged-arc welding that anti-indenture performance is also superior.
The inventor is a purpose with the content that reduces the diffusible hydrogen in the weld metal, wholeheartedly studies moisture or its hygroscopic problem of solder flux raw meal, and the result expects and can add slag in the solder flux raw meal.Slag is made up of nature of glass homogeneous, and contains as the available composition of solder flux, has the poor advantage of the crystallization water.
In the solder flux raw meal, add the whole bag of tricks of slag by research, if the inventor finds to add in right amount the slag powder with specified particle size and specific area, the superior sinter molding flux of anti-moisture pick-up properties can be formed, the few weld metal of diffusible hydrogen content can be obtained.
The inventor finds that also for producing indenture to the greatest extent less in the unsettled places of welding arc such as welding beginning portion, tack weld portions, using the iron content solder flux raw material that contains 5-10wt% iron is effective as the solder flux part of raw materials.
The ferrous components here is meant that (Total Fe T.Fe), is meant the containing ratio of whole iron of measuring according to the method for JIS M8212 to the whole iron that contain in the so-called raw material.
The inventor also finds in addition, if utilize the slag of submerged-arc welding, Li repeatedly again
2O, Na
2O and K
2O left behind easily, and these materials accumulate gradually, are easy to generate pit, so the inventor expects controlling the accumulation of these materials.
The present invention constitutes in view of above-mentioned discovery.
That is,
1) the invention provides the used sinter molding flux of a kind of submerged-arc welding, the solder flux raw meal is mixed with adhesive, contain the slag of submerged-arc welding in the used sinter molding flux of granulation, the submerged-arc welding of burning till, the specific area of solder flux is at 0.3m
2/ cm
3Or below.
2) slag of submerged-arc welding preferably accounts for the 10-90wt% of solder flux total amount, the Li in the solder flux
2O, Na
2O and K
2The content total of O accounts for 3wt% or following.
3), preferably also contain 10wt% or above and less than the iron content solder flux raw material of 30wt%, the iron content total amount of this iron content solder flux raw material is 5-10wt% in the above-mentioned solder flux of the present invention with respect to the total amount of solder flux.In addition, as above-mentioned identical, Li in the solder flux
2O, Na
2O and K
2The content of O preferably is aggregated in 3wt% or following.
The composition of the sinter molding flux that submerged-arc welding of the present invention is used, with weight % meter, preferably contain at least a of the following stated or more than: all be SiO
2: 30-70%, manganese oxide: account for 5-30%, MgO:3-30%, Al with the MnO conversion
2O
3: 2-20%, CaO:10% or following, CaF
2: 15% or below, perhaps also contain deoxidier: 10% or followingly generate agent as slag.
4) the invention provides the manufacture method of the used sinter molding flux of a kind of submerged-arc welding, it is characterized in that the solder flux raw meal is with after adhesive mixes, in the manufacture method of the sinter molding flux that granulation, the submerged-arc welding of burning till are used, as the part of above-mentioned solder flux raw meal, Li
2O, Na
2O and K
2The content of O adds up to and is preferably in 5wt% or following, the slag of submerged-arc welding pulverized, and the most handy mechanical crushing, forming particle diameter is 0.1-0.5m at 3009m or following, specific area
2The slag powder of/g, total amount with respect to solder flux raw meal and adhesive, add the slag of 10-90wt%, perhaps, the total amount that will contain ferrous components again is the iron content solder flux raw material pulverizing of 5-10wt%, the most handy mechanical crushing, form particle diameter in 300 μ m or following iron content solder flux raw meal, as the part of above-mentioned solder flux raw meal,, contain 10wt% or above but in the sinter molding flux less than the described iron content solder flux raw meal of 30wt% with respect to the total amount of solder flux raw meal and adhesive.In addition, of the present invention above-mentioned burn till to be preferably under 650 ℃ or the above temperature carry out.
Corresponding with the composition of above-mentioned slag powder, flux constituent of the present invention is represented with weight %, is preferably comprised: 1, following at least one or more materials: the whole SiO that generate agent as slag
2: 30-70%, manganese oxide: be converted into MnO and account for 5-30%, MgO:3-30%, Al
2O
3: 2-20%, CaO:10% or following, CaF
2: 15% or below; 2 or add deoxidier again: 10% or below; 3, Li
2O, Na
2O and K
2O, their content total is preferably in 3wt% or following, is made into the solder flux raw meal by mentioned component.
5) the solder flux raw meal is with after adhesive mixes, in the preferable production process of the sinter molding flux that granulation, the submerged-arc welding of the present invention of burning till are used, as the part of above-mentioned solder flux raw meal, Li
2O, Na
2O and K
2The content of O adds up to and is preferably in 5wt% or following, the slag of submerged-arc welding pulverized, and the most handy mechanical crushing, forming particle diameter is 0.1-0.5m at 300 μ m or following, specific area
2The slag powder of/g.
The present invention adds the slag powder as the part of solder flux raw meal.
The amount of the slag powder that adds accounts for the 10-90wt% of solder flux raw meal and adhesive total amount.By adding the slag powder of 10wt% or above quantity, can significantly reduce the content of the diffusible hydrogen in the weld metal, can obtain fabulous anti-hydrogen induced cracking performance.
On the other hand, the adhesive when fully adding the deoxidier that improves the welding bead outward appearance or granulation, the addition of slag powder is preferably in 90wt% or following.
From adjusting the viewpoint of flux constituent, the addition of slag powder is preferably in 50wt% or following.
Li in the slag that adds
2O, Na
2O and K
2The content total of O is preferably in 5wt% or following.If Li
2O, Na
2O and K
2The content of O adds up to and surpasses 5wt%, the Li in the finished product solder flux
2O, Na
2O and K
2The content of O increases, and what the gas that produces during welding was overflowed in the slag is worse off, and is easy to generate pit.
The slag that adds in solder flux of the present invention forms particle diameter 300 μ m or following preferably with the slag mechanical crushing of submerged arc Produced after Welding, and in other words roughly to account for 100% specific area be 0.1-0.5m for 300 μ m or following particle
2The slag powder of/g.
If the particle diameter of slag powder surpasses 300 μ m, granulation will worsen.Therefore, the particle diameter of slag powder is preferably in 300 μ m or following.
And the specific area of the slag powder that adds is no more than 0.1m
2/ g can cause the granulation deterioration, and the addition of the adhesive during granulation increases.If the amount of adhesive increases, the moisture when burning till in the solder flux just is difficult to remove, and the content of the diffusible hydrogen in the weld metal increases.
On the other hand, if the specific area of slag powder surpasses 0.5m
2/ g, the water absorption of the material of the not molten condition that comprises in the slag powder increases, and the content of the diffusible hydrogen in the weld metal increases.Therefore, the specific area of slag powder preferably is in 0.1-0.5m
2The scope of/g.Moreover the specific area of particle adopts the value of measuring according to the BET method of nitrogen absorption.
Moreover, exist a considerable amount of specific areas to be no more than 0.1m in the unadjusted slag powder
2/ g, particle diameter surpasses the particle of 300 μ m.
The slag powder is preferably generated by the solder flux identical or close with the flux constituent that will make.If but during the slag that generates with the solder flux of heterogeneity,, adjust the composition of solder flux owing to can add oxide or fluoride etc., special problem can not appear.
The present invention can add the iron content solder flux raw meal of iron content 5-10wt% where necessary, as the part of solder flux raw meal.This iron content solder flux raw meal preferably be equal to or greater than solder flux raw meal and adhesive total amount 10wt% and be no more than 30wt%.
If use the solder flux that has added iron content solder flux raw meal as the solder flux raw meal, weld, can suppress the generation of indenture.
The ferrous components that contains in the iron content solder flux raw meal is oxidized when generating, and forms the oxide of iron, is included in the finished product solder flux.During welding, the carbon reaction in the oxide of the iron in this solder flux and welding wire and the steel plate produces CO, CO
2Gas.In case this CO, CO
2The generating capacity of gas increases, and the dividing potential drop of the nitrogen in the electric arc air pocket reduces, the result, and the content of the nitrogen in the weld metal reduces.Nitrogen content in the weld metal reduces, and just can suppress the generation of indenture.
Be fit to iron content solder flux raw material of the present invention such as nickel slag, manganese slag, titanium slag, the ore of the oxide of ore class such as olive sand (comprising serpentinite) and a part of manganese.
In addition, even the slag class of other manganese slag, blast furnace cinder etc., or the ore class of zircon sand, silica sand, magnesia slag etc., if because of the influence that generates the technology and the place of production etc. contains (5-10wt%) iron in right amount, still can be used as iron content solder flux raw material.More broadly, so long as slag generates agent, and contains a certain amount of iron, iron content solder flux raw material just is not limited to above-mentioned substance so.
With these iron content solder flux raw material pulverizing, the most handy mechanical crushing forms particle diameter: 300 μ m or following iron content solder flux raw meal.In addition in case of necessity, also can burn till, remove the pre-treatment of moisture etc.
Contained iron is no more than 5wt% in the iron content solder flux raw material, the CO that produces during solder flux, CO
2The amount of gas reduces, the effect of nitrogen content in the weld metal that can not be reduced.
On the other hand, in case contained iron surpasses 10wt% in the iron content solder flux raw material, though the nitrogen content in the weld metal has reduced, the fissility of slag worsens, and produces and peels off bad phenomenon.Therefore, wish that iron in the iron content solder flux raw material is in the scope of 5-10wt%.
In addition, if add iron content solder flux raw meal, make its 10wt% that accounts for solder flux raw meal and adhesive total amount or more than, reduce the works very well of the content of the nitrogen in the weld metal.
On the other hand, if add 30wt% or more than, the CO that produces during solder flux, CO
2The generation of gas increases, and is easy to generate pit, therefore, when necessarily requiring fabulous anti-pit, best not enough 30wt%.
Thus, the addition that contains the iron content solder flux raw meal of 5-10wt% iron be preferably in solder flux raw meal and adhesive total amount 10wt% or more than, and less than the scope of 30wt%.
Iron content solder flux raw material is the bulk or the powdery of or mechanical crushing broken by pigment usually, preferably use the iron content solder flux raw material pulverizing of machinery among the present invention again with bulk or powdery, form particle diameter at 300 μ m or following, in other words, 300 μ m or following particle roughly account for 100% iron content solder flux raw meal.If the particle diameter of iron content solder flux raw meal surpasses 300 μ m, granulation will worsen.Therefore, wish that the particle diameter of iron content solder flux raw meal is at 300 μ m or following.
The composition of the iron content solder flux raw meal of adding again corresponding to the slag powder that adds as the part of solder flux raw meal among the present invention or as the part of solder flux raw meal, in the solder flux raw meal, solder flux preferably comprises following at least a or more than one slag and generates agent.Represent with weight % (wt%).
SiO
2:30-70％
SiO
2Add as slag former, be used to the welding bead outward appearance that keeps good.Less than 30% its effect is not enough.Particularly the combination at place, welding bead end is very important when the high speed fillet welding, at this moment SiO
2Less than 30% just can not keep good welding bead.On the other hand, if surpass 70%, content is big, and viscosity is too high, makes the turmoil of welding bead outward appearance on the contrary easily, produces the problems such as fissility deterioration of slag.Therefore, SiO
2Addition be preferably in the scope of 30-70%.
Manganese oxide (amount with MnO converts): 5-30%
Even adding manganese oxide is for when speed of welding is high, also can make the end desired binding of welding bead.It is very important to become when particularly using fillet welding with solder flux.Convert with MnO, if less than 5%, its effect be can't see, if surpass 30%, and the then reaction of the CO in fusion pool aggravation, welding bead degraded appearance.Therefore, the addition of manganese oxide converts with the amount of MnO, is preferably in the scope of 5-30%.
MgO:3-30％
MgO regulates the fusing point and the viscosity of slag, is the active ingredient of guaranteeing good slag fissility.Less than 3% can not obtain effect completely, and on the other hand, if surpass 30%, viscosity is too low, and fusing point too rises, and the welding bead outward appearance has the tendency of deterioration.Therefore, MgO is preferably in the scope of 3-30%.
Al
2O
3:2-20％
Al
2O
3Be to adjust the viscosity of slag and the important component of fusing point, less than 2% lacks above-mentioned effect, and on the other hand, if surpass 20%, fusing point rises excessive, causes the shape of welding bead to worsen, so be preferably in the scope of 2-20%.
CaO:10% or following
CaO is the composition that influences the flowability of slag, if surpass 10%, can damage flowability, causes weld bead shape to worsen, wish CaO 10% or below.0.1-5% preferably.
CaF
2: 15% or below
CaF
2Be the composition that improves the flowability of slag, if surpass 15%, slag is easy to flow.Therefore wish CaF
2Account for 15% or below.Preferably 0.5% or more than.
In addition, generate agent, also can add following one or more materials: TiO in case of necessity as slag
2: 10% or following, BaO:5% or following, ZrO:5% or following, B
2O
3: 4% or following, CaCO
3: 5% or below.
TiO
2Be reduced in welding, Ti enters in the weld metal, has improved the toughness of weld metal.But if surpass 10%, toughness can become bad on the contrary.
Interpolation BaO, ZrO are basicity and the fusing points in order to adjust slag.But surpass 5% when adding, can make the fissility of welding bead outward appearance and slag all become bad.
By the reduction reaction in the welding, B
2O
3Enter in the weld metal, help to improve the toughness of weld metal.But,, can increase the solidification cracking of weld metal if surpass 4%.
CaCO
3When welding, decompose, produce CO
2, therefore the branch drops of hydrogen has reduced the hydrogen content in the weld metal effectively.If but surpassing 5%, it is bad that the welding bead outward appearance can become.
Except that above-mentioned substance, preferably add deoxidier again.
Deoxidier: 10% or below
The preparation deoxidier preferably makes the gloss on welding bead surface or the toughness of weld metal increase.Can consider the alloy of Ti, Al, Si, Mn etc. or these elements and iron (Fe) element as deoxidier, wherein Si, Mn or Antaciron, manganeisen are suitable.It is also passable only to add a kind of deoxidier, and perhaps compound interpolation is also passable.But, surpass 10%, even add, effect is also saturated again, deoxidier preferably add 10% or below.Preferably 1% or more than.
These solder flux raw meal by a certain amount of preparation are mixing with adhesive, burn till after the granulation.Comminution granulation has no particular limits, the most handy rotary type comminutor, extruded type comminutor.After the granulation, remove chip, carry out the whole grain of oarse-grained pulverizing etc. and handle, preferably make the particle of particle diameter in the 0.075-1.4mm range size.
The aqueous solution, the waterglass of polyvinyl alcohol etc. are suitable as adhesive.Especially in the past the SiO of Shi Yonging
2And Na
2The mol ratio of O is that 1～5 sodium metasilicate (waterglass) is just enough.Use amount is that every 1kg solder flux raw meal 80-150cc is just passable.
Firing temperature be preferably in 650 ℃ or more than.If firing temperature is lower than 650 ℃, the moisture drying of being brought into by adhesive gets not thorough, causes the diffusible hydrogen in the weld metal to increase.By improving firing temperature, can reduce to burn till the specific area of back solder flux.For the specific area that makes solder flux at 0.3m
2/ cm
3Or below, firing temperature be preferably in 650 ℃ or more than.
Solder flux of the present invention is preferably made by above-mentioned technology, mixes solder flux raw meal and adhesive, in the sinter molding flux that burns till, part as the solder flux raw meal, contain the slag powder that generates after the submerged-arc welding, perhaps also contain iron content solder flux raw meal, specific area is at 0.3m
2/ cm
3Or below.
By above-mentioned technology, the specific area of solder flux is at 0.3m
2/ cm
3Below, if the specific area of solder flux surpasses 0.3m
2/ cm
3, the content of the diffusible hydrogen in the weld metal increases.Therefore, the upper limit of the specific area of sinter molding flux of the present invention is 0.3m
2/ cm
3The value identical with the slag powder, that specific area uses the BET method to measure.
In the slag composition of the present invention, Li
2O, Na
2O and K
2The summation of the content separately of O preferably defines at 3wt% or following.Li
2O, Na
2O and K
2If the total amount of O surpasses 3wt%, the gas that produces during welding will worsen from the effusion situation in the slag, is easy to generate pit.Li
2O, Na
2O and K
2The total amount of O is at 3wt% or when following, and the addition of slag preferably is limited in 50wt% or following.
Utilize the embodiment of slag
(embodiment 1)
With mechanical crushing composition as shown in table 1 by the welding slag that submerged-arc welding generated, form particle diameter at 300 μ m or following, specific area is 0.21m
2The slag powder of/g.Mix slag powder, other solder flux raw meal and bond with the ratio shown in the table 2, form the particle of 12-100 sieve mesh through granulation.Burnt till through 650 ℃ * 1 hour.Also available water glass is as bond.
About these sinter molding fluxes, use solder flux through moisture absorption in 24 hours in 30 ℃, the protection gas of relative humidity 80%, respectively according to JIS Z 3118, measure the content of the diffusible hydrogen in the weld metal.Carry out the test of 3 diffusible hydrogen contents repeatedly, adopt its mean value.Its result is as shown in table 3.
According to table 3, the dosage of slag powder is in 10wt% or above embodiments of the invention (solder flux No.3-No.7), and the content of the diffusible hydrogen in the weld metal reduces.On the other hand, in the comparative example (solder flux No.1, No.2) of the dosage of slag powder beyond the scope of the present invention, the content height of diffusible hydrogen.
Li in the slag that uses
2O, Na
2O and K
2The total amount of O 5% or below, the Li in the solder flux that obtains
2O, Na
2O and K
2The total amount of O in solder flux No.1-No.4, No.19, account for 3% or below, anti-pit is good.On the other hand, the Li among solder flux No.5, No.6, the No.7
2O, Na
2O and K
2The total amount of O is respectively 3.1%, 3.3%, 3.7%, has produced pit in the welding bead with these solder flux.Adopt the pit that produces in the welding bead of solder flux No.7 more.
(embodiment 2)
Add the slag by the submerged-arc welding generation of composition as shown in table 4, as the part of solder flux raw meal.Slag forms particle diameter as shown in table 5, the slag powder of specific area through mechanical crushing.The addition of slag powder accounts for the 30wt% of the total amount of solder flux raw meal and bond.The solder flux raw meal that contains the slag powder again and bond (waterglass) mixing, granulation forms the particle of 8-200 sieve mesh.Under 850 ℃ * 15 minutes condition, burn till subsequently, form the composition as shown in table 5 and the sinter molding flux of specific area.
These solder flux are 1) moisture absorption in 30 ℃, the protection gas of relative humidity 80%; 2) do not carry out handling under these two kinds of conditions of moisture absorption, use these solder flux,, measure the content of the diffusible hydrogen in the weld metal according to JIS Z 3118.Repetition test 3 times is represented the content of diffusible hydrogen with their mean value.Adopt the Mn metal welding wire (4.8mm φ) of these solder flux and 2%, at welding current is 700A, and weldingvoltage is 30V, and speed of welding is under the welding condition of 40cm/min, the steel plate that is equivalent to SM490 is carried out horizontal fillet welding (welding to I The body meat down), check the welding bead outward appearance.Its result is as shown in table 5.
According to table 5, the diffusible hydrogen content of embodiments of the invention (solder flux No.8-No.10) is low, and the welding bead outward appearance is good.But, the embodiments of the invention that the specific area of slag powder is big (solder flux No.11) though the welding bead outward appearance good, the content of the diffusible hydrogen that produces increases, anti-hygroscopicity is variation a little.During the solder flux of solder flux No.11 after using moisture absorption, produce indenture in the welding bead.
The grain shape of slag powder is big, and the granulation deterioration of the comparative example (solder flux No.12) of the specific area of solder flux outside scope of the present invention produces efflorescence, and the welding bead outward appearance is bad, can not be used for the mensuration of diffusible hydrogen content.
Moreover, the Li in the slag of use
2O, Na
2O and K
2The total amount of O 5% or below, the Li among the solder flux No.8-No.11 that obtains
2O, Na
2O and K
2The total amount of O 3% or below, its anti-pit is good.
(embodiment 3)
Interpolation is adjusted into the slag powder of the grain shape shown in the table 6 by mechanical crushing, as the part of solder flux raw meal, after, the granulation mixing with other solder flux raw meal, bond, burns till under 550-850 ℃ temperature.The addition of slag powder accounts for the 30wt% of the total amount of solder flux raw meal and bond.Firing time is defined as 5 minutes.
The composition of the solder flux after burning till and the specific area of solder flux are as shown in table 6.Similarly these solder flux are carried out the mensuration of the diffusible hydrogen in the weld metal with embodiment 1 and embodiment 2, its result is as shown in table 6.
According to table 6, the specific area of solder flux is at 0.3m
2/ cm
3Or the content of the diffusible hydrogen in the following embodiments of the invention (solder flux No.14-No.16) all is controlled at lower level.Along with the rising of firing temperature, the specific area of sinter molding flux reduces, and the content of diffusible hydrogen reduces.Because the specific area of solder flux reduces, the absorption of moisture has also reduced.
Because firing temperature increases, the specific area of sinter molding flux reduces, and can think, this is because the fusion amount of bond increases, or viscosity descends, so the flux particle surface is easy to form due to the film of homogeneous.
Li in the slag that uses
2O, Na
2O and K
2The total amount of O 5% or below, the Li in the solder flux that obtains
2O, Na
2O and K
2The total amount of O all 3% or below, its anti-pit is good.
(embodiment 4)
By mechanical crushing, particle diameter is adjusted into 300 μ m or following, specific area is adjusted into 0.13m
2Behind/the g, by magnetic separation, prepare the slag powder of composition as shown in table 7, make its part as the solder flux raw meal, account for the 50wt% of solder flux raw meal and bond total amount, mixing with other solder flux raw meal and bond, behind the particle through granulation formation 12-60 sieve mesh, burnt till the sinter molding flux of composition and specific area shown in the formation table 8 through 750 ℃ * 30 minutes.Available Na
2O and K
2The different waterglass of the amount of O is as bond.
About these solder flux, similarly the diffusible hydrogen in the weld metal is measured with embodiment 1 and embodiment 2, adopt the Mn welding wire (4.8mm φ) of these solder flux and 2%, at welding current is 700A, weldingvoltage is 30V, speed of welding is under the welding condition of 40cm/min, and the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, checks the welding bead outward appearance.Its result is as shown in table 8.
According to table 8, the Na in the solder flux
2O and K
2The total amount of O 3% or the content of the diffusible hydrogen of following embodiments of the invention (solder flux No.17) low, and the welding bead outward appearance is good.
On the other hand, use increases Na consciously
2O and K
2The bond of the content of O is at Na
2O and K
2The total amount of O is low above the content of diffusible hydrogen in 3% the comparative example (solder flux No.18), but the welding bead surface has produced pit, and it is bad that the welding bead outward appearance becomes.
Utilize the embodiment of slag and iron content solder flux raw meal
(embodiment 5)
With mechanical crushing composition as shown in table 9 by the welding slag that submerged-arc welding generated, form particle diameter at 300 μ m or following, specific area is 0.21m
2The slag powder of/g.By mechanical crushing, the serpentinite that will contain 9% iron forms particle diameter 300 μ m or following particle, burns till under 1000 ℃, forms iron content solder flux raw meal.
Mix slag powder, iron content solder flux raw meal, other solder flux raw meal and bond with the ratio shown in the table 10, form the particle of 12-100 sieve mesh through granulation.Burnt till through 650 ℃ * 1 hour again.With waterglass as bond.The iron-holder of the solder flux raw meal in the table 10 beyond the serpentinite is no more than 5%.
About these sinter molding fluxes, use solder flux through moisture absorption in 24 hours in 30 ℃, the protection gas of relative humidity 80%, respectively according to JIS Z 3118, measure the content of the diffusible hydrogen in the weld metal.Carry out the test of 3 diffusible hydrogen contents repeatedly, adopt its mean value.
Using the Mn welding wire (4.8mm φ) of these solder flux and 2%, is 700A at welding current, and weldingvoltage is 30V, and speed of welding is under the welding condition of 40cm/min, and the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, checks its welding bead outward appearance.Its result is as shown in table 11.
According to table 11, the dosage of slag powder is in 10wt% or above embodiments of the invention (solder flux No.2-No.7), and the content of the diffusible hydrogen in the weld metal reduces.On the other hand, in the comparative example (solder flux No.1) of the dosage of slag powder beyond the scope of the present invention, the content height of diffusible hydrogen.
Li in the slag that uses
2O, Na
2O and K
2The total amount of O 5% or below, the Li in the solder flux that obtains
2O, Na
2O and K
2The total amount of O in solder flux No.1-No.3, No.7, account for 3% or below, do not produce pit and indenture, the welding bead outward appearance is good.
On the other hand, the Li among solder flux No.4, No.5, the No.6
2O, Na
2O and K
2The total amount of O is respectively 3.1%, 3.7%, 4.1%, does not produce indenture in the welding bead with these solder flux, but has produced pit.Adopt the pit that produces in the welding bead of solder flux No.6 more.
(embodiment 6)
By mechanical crushing, particle diameter is adjusted into 300 μ m or following, specific area is adjusted into 0.13m
2Behind/the g, the slag powder of composition as shown in table 12 that will be by magnetic separation, by mechanical crushing form particle diameter at the nickel slag of 300 μ m or following composition as shown in table 13 as iron content solder flux raw meal, mix this slag powder and iron content solder flux raw meal with the ratio shown in the table 14, mixing with other solder flux raw meal, bond, form the particle of 12-100 sieve mesh through granulation after, burn till through 900 ℃ * 1 hour, obtain sinter molding flux.The iron-holder of the solder flux raw meal beyond the nickel slag is no more than 5wt%.
As the Li in the slag of raw material and the solder flux that obtains
2O, Na
2O and K
2The amount of O is all at 3wt% or following.
Adopt the welding wire shown in these solder flux and the table 15, at welding current is 700A, and weldingvoltage is 30V, and speed of welding is under the welding condition of 40cm/min, the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, check at that time weld job and the nitrogen content of weld metal.Measure the content of diffusible hydrogen similarly to Example 5.Its result is shown in table 16.
Added slag and as the solder flux of the nickel slag of iron content solder flux raw meal ideal range amount, the content of its diffusible hydrogen is low, the nitrogen content in the weld metal is few, does not produce indenture, and the welding bead outward appearance is good.
But in the comparative example of nickeliferous slag (solder flux No.8), the unsettled welding beginning of welding arc portion does not produce indenture.When the amount of nickel slag surpasses desirable scope (solder flux No.11), do not produce indenture, but the welding bead surface can produce pit, the welding bead outward appearance worsens.
(embodiment 7)
The slag and the iron content solder flux raw meal of adding the submerged-arc welding generation of composition shown in table 17 are olive sand, as the part of solder flux raw meal.Slag forms the particle diameter shown in table 18 and the slag powder of specific area through mechanical crushing.Olive sand adopts through mechanical crushing and forms particle diameter 300 μ m or following, the burned material under 1000 ℃.The addition of slag powder and olive sand powder accounts for the 30wt% and the 25wt% of solder flux raw meal and bond total amount respectively.The solder flux raw meal that contains slag powder and olive sand powder again and bond (waterglass) mixing, granulation forms the particle of 8-200 sieve mesh.
Then, under 850 ℃ * 15 minutes condition, burn till, form the sinter molding flux of composition shown in table 18 and specific area.The iron-holder of the solder flux raw meal beyond the olive sand in the table 18 is no more than 5wt%.
These solder flux are 1) moisture absorption in 30 ℃, the protection gas of relative humidity 80%; 2) do not carry out handling under these two kinds of conditions of moisture absorption, use these solder flux,, measure the content of the diffusible hydrogen in the weld metal according to JIS Z 3118.Repetition test 3 times is represented the content of diffusible hydrogen with their mean value.
Adopting the Mn welding wire (4.8mm φ) of these solder flux and 2%, is 700A at welding current, and weldingvoltage is 30V, and speed of welding is under the welding condition of 40mm/min, and the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, checks the welding bead outward appearance.Its result is shown in table 18.
According to table 18, the diffusible hydrogen content of embodiments of the invention (solder flux No.12-No.14) is low, and the welding bead outward appearance is good.But, the embodiments of the invention that the specific area of slag powder is big (solder flux No.15) though the welding bead outward appearance good, the content of the diffusible hydrogen that produces increases, anti-hygroscopicity is variation a little.
The grain shape of slag powder is big, and the granulation deterioration of the comparative example (solder flux No.16) of the specific area of solder flux outside scope of the present invention produces efflorescence, and the welding bead outward appearance is bad, can not be used for the mensuration of diffusible hydrogen content.
Li in the slag that uses
2O, Na
2O and K
2The total amount of O 5% or below, the Li among the solder flux No.12-No.15 that obtains
2O, Na
2O and K
2The total amount of O 3% or below, its anti-pit is good.
(embodiment 8)
Adding process mechanical crushing slag powder that is adjusted into grain shape shown in table 19 and the iron content solder flux raw meal that contains 5wt% is titanium slag, part as the solder flux raw meal, after, the granulation mixing, under 550-850 ℃ temperature, burn till with other solder flux raw meal, bond.
The addition of slag powder and titanium slag accounts for the 40wt% and the 10wt% of the total amount of solder flux raw meal and bond respectively.Firing time is defined as 5 minutes.
The solder flux composition after burning till and the specific area of solder flux are shown in table 19.About these solder flux, similarly the diffusible hydrogen in the weld metal is measured with embodiment 5, embodiment 6.Adopting the Mn metal wire welding wire (4.8mm φ) of these solder flux and 2%, is 700A at welding current, and weldingvoltage is 30V, and speed of welding is under the welding condition of 40cm/min, and the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, checks the welding bead outward appearance.Its result is shown in table 19.
According to table 19, the specific area of solder flux is at 0.3m
2/ cm
3Or the diffusible hydrogen content in the following embodiments of the invention (solder flux No.18-No.20) all is controlled at lower level.Along with the rising of firing temperature, the specific area of sinter molding flux reduces, and the content of diffusible hydrogen reduces.Can think because the specific area of solder flux reduces, due to the absorption of moisture also reduces.
The welding bead outward appearance of embodiments of the invention (solder flux No.18-No.20) is all good.
Because firing temperature rises, the specific area of sinter molding flux reduces, and this can think because the fusion amount of bond increases, or viscosity descends, so the flux particle surface is easy to form due to the film of homogeneous.
Li in the slag that uses
2O, Na
2O and K
2The total amount of O 5% or below, the Li in the solder flux that obtains
2O, Na
2O and K
2The total amount of O all 3% or below, its anti-pit is good.
(embodiment 9)
By mechanical crushing, particle diameter is adjusted into 300 μ m or following, specific area is adjusted into 0.13m
2Behind/the g, the slag powder and the particle diameter of the composition shown in table 20 that will obtain by magnetic separation are 300 μ m or following Mn shown in table 20
3O
4Powder, part as the solder flux raw meal, they account for the 20wt% and the 25wt% of solder flux raw meal and bond total amount respectively, it is mixing with other solder flux raw meal and bond, form the particle of 12-60 sieve mesh through granulation after, burnt till the sinter molding flux of composition and specific area shown in the formation table 21 through 750 ℃ * 30 minutes.In table 21, Mn
3O
4Iron-holder in the raw material in addition is no more than 5wt%.Available Na
2O and K
2The different waterglass of the amount of O is as bond.
About these solder flux, similarly the diffusible hydrogen in the weld metal is measured with embodiment 5 and embodiment 6, adopt the Mn welding wire (4.8mm φ) of these solder flux and 2%, at welding current is 700A, weldingvoltage is 30V, speed of welding is under the welding condition of 40cm/min, and the steel plate that is equivalent to SM490 is carried out horizontal fillet welding, checks the welding bead outward appearance.Its result is shown in table 21.
According to table 21, the Na in the solder flux
2O and K
2The total amount of O 3% or the content of the diffusible hydrogen of following embodiments of the invention (solder flux No.21) low, and the welding bead outward appearance is good.
On the other hand, use increases Na consciously
2O and K
2The bond of the content of O is at Na
2O and K
2The total amount of O is low above the content of diffusible hydrogen in 3% the comparative example (solder flux No.22), but the welding bead surface has produced pit, and it is bad that the welding bead outward appearance becomes.Iron-holder in using raw material is low above the content of diffusible hydrogen in the comparative example (solder flux No.23, No.24) of the solder flux raw meal of 10wt%, but the welding bead surface has produced pit, produces the phenomenon that slag is difficult for peeling off.
Use the present invention, can obtain the good sinter molding flux of anti-hygroscopicity,, can obtain the few weld metal of diffusible hydrogen content, can realize significantly reducing the remarkable result of the danger of weld hydrogen induced cracking appearance with this solder flux welding.
Use the present invention,, also can prevent to produce pit even utilize slag repeatedly again.
Use the present invention, can produce CO, CO in right amount during welding
2Gas reduces the nitrogen content in the weld metal, can prevent to produce indenture.
[table 1] (wt%)
| Fe (total) | SiO 2 | ?MnO | ?Al 2O 3 | ??CaO | ?CaF 2 | ???MgO |
| ???2 | ???37 | ???7 | ???14 | ???10 | ???2 | ???24 |
[table 2]
| Solder flux No. | Solder flux atom material use level (wt%) | Annotate | |||||||||||
| Slag | Magnesia MgO | Aluminium oxide Al 2O 3 | Silica sand SiO 2 | Manganese oxide MnO | Fluorite CaF 2 | Lime stone CaCO 3 | Rutile TiO 2 | Frit | Antaciron Fe-Si | Manganeisen Fe-Mn | The waterglass solid constituent | ||
| ????1 | ????0 | ???26 | ????4 | ?????48 | ???10 | ???2 | ????0 | ????2 | ????0 | ????3 | ????0 | ????5 | Comparative example |
| ????2 | ????8 | ???25 | ???11 | ?????33 | ????9 | ???5 | ????0 | ????0 | ????2 | ????0 | ????3 | ????4 | Comparative example |
| ????3 | ???12 | ????9 | ????8 | ?????36 | ???11 | ???7 | ????4 | ????5 | ????0 | ????3 | ????0 | ????5 | Embodiments of the invention |
| ????4 | ???29 | ???10 | ????9 | ?????26 | ????9 | ???5 | ????0 | ????2 | ????3 | ????0 | ????3 | ????4 | Embodiments of the invention |
| ????5 | ???51 | ????3 | ????5 | ?????19 | ????7 | ???2 | ????3 | ????0 | ????0 | ????3 | ????3 | ????4 | Embodiments of the invention |
| ????6 | ???68 | ????3 | ????2 | ??????9 | ????3 | ???3 | ????0 | ????0 | ????2 | ????4 | ????3 | ????3 | Embodiments of the invention |
| ????7 | ???89 | ????0 | ????0 | ??????0 | ????0 | ???0 | ????0 | ????0 | ????0 | ????3 | ????5 | ????3 | Embodiments of the invention |
| ???19 | ???45 | ????5 | ????5 | ?????24 | ????5 | ???2 | ????1 | ????2 | ????3 | ????4 | ????0 | ????4 | Embodiments of the invention |
[table 3]
| Solder flux | The dosage of slag powder (wt%) | Specific area (the m of solder flux 2/cm 3) | Li in the solder flux 2O、Na 2O、 ????K 2The total amount of O (wt%) | The content of diffusible hydrogen (ml/100g) | Annotate |
| ????1 | ??????0 | ?????0.22 | ?????????2.8 | ?????12.5 | Comparative example |
| ????2 | ??????8 | ?????0.19 | ?????????2.5 | ?????13.2 | Comparative example |
| ????3 | ?????12 | ?????0.27 | ?????????2.4 | ?????8.9 | Embodiments of the invention |
| ????4 | ?????29 | ?????0.25 | ?????????2.1 | ?????9.3 | Embodiments of the invention |
| ????5 | ?????51 | ?????0.19 | ?????????3.1 | ?????8.1 | Embodiments of the invention |
| ????6 | ?????68 | ?????0.24 | ?????????3.3 | ?????9.5 | Embodiments of the invention |
| ????7 | ?????89 | ?????0.22 | ?????????3.7 | ?????8.8 | Embodiments of the invention |
| ???19 | ?????45 | ?????0.21 | ?????????2.8 | ?????8.5 | Embodiments of the invention |
[table 4]
(wt％)
| Fe (total) | ??SiO 2 | ??MnO | ?Al 2O 3 | ?CaO | ?CaF 2 | ???MgO |
| ????4 | ???48 | ???13 | ???11 | ??1 | ??1 | ???19 |
[table 5]
| Solder flux No. | The addition (wt%) of the slag powder in the solder flux | The shape of slag powder | The composition of sinter molding flux (wt%) | Amount (the ml/100g of diffusible hydrogen | The welding bead outward appearance | Other | Remarks | |||||||||
| Particle diameter | Specific area m 2/g | The specific area m of solder flux 2/cm 3 | ??SiO 2 | ?Al 2O 3 | ???MgO | ???MnO | ?CaO | ?CaF 2 | Other | Do not carry out moisture absorption | Carry out moisture absorption | |||||
| ????8 | ??????30 | 300 μ m or following particle account for 100% | ??0.13 | ????0.20 | ???44 | ????8 | ???15 | ???11 | ???5 | ???5 | ???12 | ???4.2 | ????6.4 | Well | ??- | Embodiments of the invention |
| ????9 | ??????30 | 300 μ m or following particle account for 100% | ??0.29 | ????0.21 | ???46 | ????9 | ???15 | ???11 | ???5 | ???4 | ???10 | ???3.8 | ????7.2 | Well | ??- | Embodiments of the invention |
| ???10 | ??????30 | 300 μ m or following particle account for 100% | ??0.48 | ????0.20 | ???43 | ????8 | ???16 | ???11 | ???5 | ???5 | ???12 | ???5.1 | ????8.2 | Well | ??- | Embodiments of the invention |
| ???11 | ??????30 | 300 μ m or following particle account for 100% | ??5.3 | ????0.22 | ???43 | ????9 | ???17 | ???11 | ???5 | ???4 | ???11 | ???6.7 | ????10.8 | Well | ??- | Embodiments of the invention |
| ???12 | ??????30 | The particle of 1mm～300 μ m accounts for 9% 300 μ m or following particle accounts for 91% | ??1.1 | ????0.31 | ???43 | ????8 | ???16 | ???12 | ????5 | ????5 | ???11 | ????- | ??????- | Bad | Efflorescence | Comparative example |
[table 6]
| Solder flux | The shape of the slag that adds | Burn till | Burn till the composition (wt%) of back solder flux | Specific area (the m of solder flux 2/cm 3) | The content of diffusible hydrogen (ml/100g) | Remarks | |||||||||
| ???No. | Particle diameter (μ m) | Specific area (m 2/g) | Addition (wt%) | Temperature (℃) | Time (min) | ?SiO 2 | ?Al 2O 3 | ???MgO | ???MnO | ?CaO | ?CaF 2 | Other | |||
| ???13 | 300 μ m or following | ???0.29 | ???30 | ???550 | ????5 | ??46 | ????9 | ???15 | ???11 | ??5 | ???4 | ???10 | ????0.36 | ???10.7 | Comparative example |
| ???14 | ???650 | ????0.29 | ???7.5 | Embodiments of the invention | |||||||||||
| ???15 | ???750 | ????0.18 | ???6.7 | Embodiments of the invention | |||||||||||
| ???16 | ???850 | ????0.15 | ???6.3 | Embodiments of the invention | |||||||||||
[table 7] (wt%)
| Fe (total) | ?SiO 2 | ?MnO | Al 2O 3 | ?CaF 2 | MgO | ?K 2O | Na 2O |
| ????2 | ????53 | ????12 | ????7 | ????4 | ????15 | ????1 | ????3 |
[table 8]
| Solder flux No. | Burn till the neat group of the type weldering state lion of looking down from a height | Specific area (the m of solder flux 2/m 3) | The content of diffusible hydrogen (ml/100g, the back is handled in moisture absorption) | The welding bead outward appearance | Other | Remarks | ||||||
| SiO 2 | Al 2O 3 | MgO | ?MnO | ?CaF 2 | Na 2O | ?K 2O | ||||||
| ?17 | ?46 | ?8 | ?14 | ?14 | ?4 | ?2.0 | ?0.5 | ?0.26 | ????5.9 | Well | ???- | Embodiments of the invention |
| ????18 | ????3.0 | ????10 | ????0.19 | ????71 | Bad | Produce pit | Than dumpling example | |||||
[table 9] (wt%)
| Fe (total amount) | SiO 2 | ??MnO 2 | ?Al 2O 3 | ??CaO | ??CaF 2 | ?MgO |
| ????2 | ????37 | ????7 | ????14 | ????10 | ????2 | ????24 |
Table 10]
| Solder flux No. | Solder flux raw material use level (%) | Annotate | ||||||||||||
| Slag | Serpentinite | Magnesia MgO | Aluminium oxide Al 2O 3 | Silica sand SiO 2 | Manganese oxide MnO | Fluorite CaF 2 | Lime stone CaCO 3 | Rutile TiO 2 | Glass lobe bucket | Antaciron Fe-Si | Manganeisen Fe-Mn | The waterglass solid constituent | ||
| 1 | ????0 | ????15 | ????19 | ????4 | ????40 | ????9 | ????2 | ????0 | ????2 | ????2 | ????3 | ????0 | ????4 | Comparative example |
| ????2 | ????12 | ????15 | ????0 | ????10 | ????31 | ????11 | ????6 | ????4 | ????4 | ????0 | ????3 | ????0 | ????4 | Embodiments of the invention |
| ????3 | ????29 | ????15 | ????2 | ????9 | ????20 | ????9 | ????4 | ????0 | ????2 | ????3 | ????0 | ????3 | ????4 | Embodiments of the invention |
| ????4 | ????51 | ????15 | ????0 | ????5 | ????10 | ????6 | ????2 | ????2 | ????0 | ????0 | ????3 | ????2 | ????4 | Embodiments of the invention |
| ????5 | ????68 | ????15 | ????0 | ????0 | ????0 | ????3 | ????3 | ????0 | ????0 | ????2 | ????1 | ????3 | ????5 | Embodiments of the invention |
| ????6 | ????79 | ????15 | ????0 | ????0 | ????0 | ????0 | ????0 | ????0 | ????0 | ????0 | ????3 | ????0 | ????3 | Embodiments of the invention |
| ????7 | ????45 | ????15 | ????0 | ????5 | ????16 | ????4 | ????2 | ????1 | ????2 | ????2 | ????4 | ????0 | ????4 | Real trip of the present invention example |
[table 11]
*After moisture absorption is handled
| Solder flux No. | The dosage of slag powder (wt%) | Specific area (the m of solder flux 2/cm 3) | Li in the solder flux 2O、Na 2O、 ???K 2The total amount of O (wt%) | The content of diffusible hydrogen *?(ml/100g) | The welding bead outward appearance | Remarks |
| ???1 | ????0 | ????0.21 | ?????2.9 | ????12.3 | Well | Comparative example |
| ???2 | ???12 | ????0.26 | ?????2.6 | ????8.0 | Well | The embodiment of the invention |
| ???3 | ???29 | ????0.22 | ?????2.2 | ????9.1 | Well | The embodiment of the invention |
| ???4 | ???51 | ????0.18 | ?????3.1 | ????7.9 | Produce pit | The embodiment of the invention |
| ???5 | ???68 | ????0.19 | ?????3.7 | ????8.1 | Produce pit | The embodiment of the invention |
| ???6 | ???79 | ????0.24 | ?????4.1 | ????8.0 | Produce pit | The embodiment of the invention |
| ???7 | ???45 | ????0.23 | ?????2.6 | ????7.8 | Well | The embodiment of the invention |
[table 12] (wt%)
| Fe (total amount) | ??SiO 2 | ???MnO | Al 2O 3 | ??CaF 2 | ??MgO | ??K 2O | ?Na 2O |
| ????2 | ???53 | ???12 | ???7 | ????4 | ???15 | ???1 | ???3 |
[table 13] (wt%)
| Iron content solder flux raw material | ??SiO 2 | ???MgO | ?Al 2O 3 | ?CaO | Total Fe |
| The nickel slag | ???56 | ???32 | ????2 | ??1 | ???7 |
[table 14]
| Solder flux No. | Solder flux raw material dosage (wt%) | Remarks | ||||||||||
| Slag | Iron content solder flux raw material | Magnesia MgO | Aluminium oxide Al 2O 3 | Silica sand SiO 2 | Manganese oxide MnO | Fluorite CaF 2 | Rutile TiO 2 | Antaciron Fe-Si | Manganese alloy Fe-Mn | The solid constituent of waterglass | ||
| ????8 | ???20 | ??????0 | ????8 | ???10 | ????33 | ????7 | ???4 | ????5 | ????6 | ????0 | ????7 | Comparative example |
| ????9 | ???20 | ?????10 | ???12 | ????8 | ????30 | ????6 | ???3 | ????0 | ????4 | ????1 | ????6 | Example of the present invention |
| ???10 | ???20 | ?????29 | ????1 | ????6 | ????17 | ????8 | ???3 | ????5 | ????3 | ????2 | ????6 | Example of the present invention |
| ???11 | ???20 | ?????38 | ????0 | ????6 | ????15 | ????6 | ???2 | ????2 | ????2 | ????4 | ????5 | Example of the present invention |
[table 15] (wt%)
| Welding wire | ????C | ????Si | ????Mn | Gage of wire |
| Welding wire 1 | ????011 | ????004 | ????2.03 | ?4.8mmφ |
| Welding wire 2 | ????006 | ????031 | ????148 | ?4.8mmφ |
[table 16]
*Welding beginning portion
*The terminal remaining slag that has of welding bead
| Solder flux No. | Specific area (the m of solder flux 2/cm 3) | The content of diffusible hydrogen (back is handled in the ml/100g moisture absorption) | Nitrogen content in the weld metal (ppm) | Have or not the generation indenture | The number of the pit that produces (individual/rice) | The evaluation of welding bead outward appearance | Remarks | |||
| Welding wire 1 | Welding wire 2 | Welding wire 1 | Welding wire 2 | Welding wire 1 | Welding wire 2 | |||||
| ????8 | ???0.21 | ????7.2 | ???113 | ????178 | Do not have | Have * | ???0 | ???????0 | Well | Comparative example |
| ????9 | ???0.20 | ????6.0 | ???71 | ????94 | Do not have | Do not have | ???3 | ???????1 | Well | Embodiments of the invention |
| ???10 | ???0.18 | ????6.3 | ???69 | ????98 | Do not have | Do not have | ???3 | ???????2 | Well | Embodiments of the invention |
| ???11 | ???0.23 | ????5.6 | ???58 | ????102 | Do not have | Do not have | ???15 | ???????12 | A bit worsen | Embodiments of the invention |
[table 17] (wt%)
| Kind | Fe (total amount) | SiO 2 | MnO | ?Al 2O 3 | ?CaO | ?CaF 2 | ?MgO |
| Slag | ????4 | ????48 | ????13 | ????11 | ????1 | ????1 | ????19 |
| Olive sand | ????6 | ????44 | ????1 | ????1 | ?46 |
[table 18]
| Solder flux No. | The addition (wt%) of the slag powder in the solder flux | The addition (wt%) of the olive sand powder in the solder flux | The shape of slag powder | The specific area m of solder flux 2/cm 3 | The composition of sinter molding flux (wt%) | The content of diffusible hydrogen (ml/100g) | The welding bead outward appearance | Produce the indenture pit | Other | Remarks | ||||||||
| Particle diameter | Specific area m 2/g | ??SiO 2 | ?Al 2O 3 | ???MgO | MnO | ?C 2O | ??CaF 2 | Other | Do not carry out moisture absorption | Moisture absorption | ||||||||
| ???12 | ????30 | ?????25 | 300 μ m or following 100% | ???0.15 | ?????0.23 | ???47 | ???5 | ???25 | ??7 | ??2 | ????3 | ???11 | ????3.8 | ????6.2 | Well | Do not produce | ??- | Embodiments of the invention |
| ???13 | ????30 | ?????25 | 300 μ m or following 100% | ???0.28 | ?????0.20 | ???47 | ???5 | ???25 | ??7 | ??2 | ????3 | ???11 | ????3.7 | ????7.6 | Well | Do not produce | ??- | Embodiments of the invention |
| ???14 | ????30 | ?????25 | 300 μ m or following 100% | ???0.45 | ?????0.24 | ???47 | ???5 | ???25 | ??7 | ??2 | ????3 | ???11 | ????4.8 | ????7.8 | Well | Do not produce | ??- | Embodiments of the invention |
| ???15 | ????30 | ?????25 | 300 μ m or following 100% | ????1.6 | ?????0.28 | ???47 | ???5 | ???25 | ??7 | ??2 | ????3 | ???11 | ????7.0 | ???10.0 | Well | Do not produce | ??- | Embodiments of the invention |
| ???16 | ????30 | ?????25 | 1mm～300 μ m 9% 300 μ m or following 91% | ????1.2 | ?????0.32 | ???47 | ???5 | ???25 | ??7 | ??2 | ????3 | ???11 | ?????- | ?????- | Bad | The pit that produces is more | Efflorescence | Comparative example |
[table 19]
*After moisture absorption is handled
| Solder flux No. | The shape of the slag that adds | The shape of the titanium slag that adds | Burn till | Burn till the composition (wt%) of back solder flux | Specific surface (the m of solder flux 2/cm 3) | The content of diffusible hydrogen *??(ml/100g) | The welding bead outward appearance | Produce the indenture pit | Remarks | ||||||||||
| Particle diameter (μ m) | Specific area (m 2/g) | Addition (wt%) | Particle diameter (μ m) | Addition (wt%) | Temperature (℃) | Time (min) | ??SO 2 | ?Al 2O 3 | ??MgO | ???MnO | ??CaO | ?CaF 2 | Other | ||||||
| ???17 | 300 μ m or following | ??0.29 | ????40 | 300 μ m or following | ????10 | ???550 | ???5 | ???51 | ???7 | ???10 | ???10 | ???10 | ???2 | ???10 | ??0.40 | ?????12.0 | Well | Do not have | Comparative example |
| ???18 | ???650 | ??0.28 | ?????7.4 | Well | Do not have | Embodiments of the invention | |||||||||||||
| ???19 | ???750 | ??0.20 | ?????6.9 | Well | Do not have | Embodiments of the invention | |||||||||||||
| ???20 | ???850 | ??0.18 | ?????6.1 | Well | Do not have | Embodiments of the invention | |||||||||||||
[table 20] (wt%)
| Kind | Fe (total amount) | ??SiO 2 | Mn (total amount) | Al 2O 3 | ?CaF 2 | ??MgO | ?K 2O | ?Na 2O |
| Slag | ????2 | ???53 | ?????9 | ???7 | ???4 | ???15 | ???1 | ???3 |
| ??Mn 3O 41 | ????6 | ????1 | ????62 | ???- | ???- | ????1 | ???- | ???- |
| ??Mn 3O 42 | ???11 | ????1 | ????57 | ???- | ???- | ????1 | ???- | ???- |
[table 21]
*The welding bead end is remaining slag
*After moisture absorption is handled
| Solder flux No. | Addition | The composition of sinter molding flux (wt%) | Specific area (the m of solder flux 2/cm 3) | The resultant of diffusible hydrogen **?(ml/100g) | The welding bead outward appearance | Other | Remarks | ||||||||
| Slag | ???Mn 3O 4(wt％) | ??SiO 2 | Al 2O 3 | ??MgO | ??MnO | ?CaF 2 | ???Na 2O | ????K 2O | |||||||
| ?(wt％) | ????1 | ????2 | |||||||||||||
| ???21 | ???20 | ???25 | ???46 | ??8 | ???14 | ???14 | ???4 | ????2.0 | ????0.5 | ???0.26 | ????5.9 | Well | Embodiments of the invention | ||
| ???22 | ???20 | ???25 | ????3.0 | ????1.0 | ???0.19 | ????7.1 | Bad | Produce pit | Comparative example | ||||||
| ???23 | ???20 | ???25 | ????2.0 | ????0.5 | ???0.23 | ????6.0 | Bad * | Produce pit | Comparative example | ||||||
| ???24 | ???20 | ???25 | ????3.0 | ????1.0 | ???0.18 | ????7.4 | Bad * | Produce pit | Comparative example | ||||||
Claims (17)
1, used for submerged arc welding sinter molding flux as the solder flux raw material, contains the submerged arc welding slag, and the specific area of this solder flux is 0.3m
2/ cm
2Or below.
2, the used for submerged arc welding sinter molding flux of claim 1 record wherein, as the solder flux raw material, contains the submerged arc welding slag of 10～90 weight %.
3, the used for submerged arc welding sinter molding flux of claim 2 record wherein, as the solder flux raw material, contains particle diameter: 300 μ m or following, specific area: 0.1～0.5m
2The submerged-arc welding ground-slag of/g.
4, the used for submerged arc welding sinter molding flux of claim 2 or 3 records, wherein Li
2O, Na
2O and K
2The total content of O is 3 weight % or following.
5, used for submerged arc welding sinter molding flux as the solder flux raw material, contains the submerged-arc welding ground-slag and has the iron content solder flux raw meal that 5～10 weight % iron divide, and the specific area of this solder flux is 0.3m
2/ cm
3Or below.
6, the used for submerged arc welding sinter molding flux of claim 5 record wherein, as the solder flux raw material, contains the submerged-arc welding ground-slag of 10～90% weight %.
7, the used for submerged arc welding sinter molding flux of claim 6 record wherein, as the solder flux raw material, contains the iron content solder flux raw meal with 5～10 weight % iron of 10～30 weight %.
8, the used for submerged arc welding sinter molding flux of claim 5 record wherein, contains the particle diameter of 10～30 weight %: 300 μ m or following, specific area: 0.1～0.5m
2The submerged-arc welding ground-slag of/g, and then contain the particle diameter of 10～30 weight % with 5～10 weight % iron: 300 μ m or following iron content solder flux raw meal, with them as the solder flux raw material.
9, the used for submerged arc welding sinter molding flux of claim 6,7 or 8 records, wherein, Li
2O, Na
2O and K
2The total content of O is 3 weight % or following.
10, the manufacture method of used for submerged arc welding sinter molding flux is after solder flux raw meal and bond mix, in the manufacture method of the sinter molding flux that carry out granulation, burns till.
The submerged-arc welding ground-slag is broken, form particle diameter: 300 μ m or following, specific area: 0.1～0.5m
2The welding ground-slag of/g contains this welding ground-slag as the solder flux raw meal.
11, the manufacture method of the used for submerged arc welding sinter molding flux of claim 10 record, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
As the solder flux raw material, contain the submerged-arc welding ground-slag of 10～90 weight %.
12, the manufacture method of the used for submerged arc welding sinter molding flux of claim 11 record, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
Li in the submerged-arc welding ground-slag
2O, Na
2O and K
2The total content of O is 5 weight % or following.
13, the manufacture method of used for submerged arc welding sinter molding flux, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
As the solder flux raw material, contain the submerged-arc welding ground-slag brokenly, form particle diameter: 300 μ m or following, specific area: 0.1～0.5m
2The welding ground-slag of/g, and then contain particle diameter: 300 μ m or following, have an iron content solder flux raw meal of 5～10 weight % iron.
14, the manufacture method of the used for submerged arc welding sinter molding flux of claim 13 record, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
As the solder flux raw material, contain the submerged-arc welding ground-slag of 10～90 weight %.
15, the manufacture method of the used for submerged arc welding sinter molding flux of claim 14 record, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
As the solder flux raw material, contain the iron content solder flux raw meal that 5～10 weight % iron divide that has of 10～30 weight %.
16, the manufacture method of the used for submerged arc welding sinter molding flux of claim 11 or 15 records, after mixing solder flux raw meal and bond, in the manufacture method of the sinter molding flux that carry out granulation, burns till,
Burn till 650 ℃ or above temperature.
17, used for submerged arc welding sinter molding flux, it is to make by the sinter molding flux manufacture process of the manufacture method that comprises each claim record in the claim 10～16.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP286412/97 | 1997-10-20 | ||
| JP286412/1997 | 1997-10-20 | ||
| JP28641297 | 1997-10-20 | ||
| JP121470/1998 | 1998-04-30 | ||
| JP12147098A JP3392347B2 (en) | 1997-10-20 | 1998-04-30 | Sintered flux for submerged arc welding and method for producing the same |
| JP121470/98 | 1998-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1222426A true CN1222426A (en) | 1999-07-14 |
| CN1116147C CN1116147C (en) | 2003-07-30 |
Family
ID=26458829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98125059A Expired - Lifetime CN1116147C (en) | 1997-10-20 | 1998-10-20 | Sinter molding flux for submerged-arc welding and its manufacture |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP3392347B2 (en) |
| KR (1) | KR100322395B1 (en) |
| CN (1) | CN1116147C (en) |
| ID (1) | ID21113A (en) |
| TW (1) | TW425325B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219509B (en) * | 2008-01-30 | 2010-11-03 | 李涛 | High-carbon high-alloy buried arc automatic weld deposit welding flux |
| CN102451962A (en) * | 2010-10-26 | 2012-05-16 | 北京新风机械厂 | Stainless steel active rosin flux and preparation method thereof |
| CN103223562A (en) * | 2012-01-27 | 2013-07-31 | 株式会社神户制钢所 | Solder for single-surface submerged-arc welding |
| CN105057922A (en) * | 2015-09-15 | 2015-11-18 | 武汉天高熔接股份有限公司 | Large-fusion-depth submerged-arc welding sintering welding flux |
| CN106736045A (en) * | 2016-12-07 | 2017-05-31 | 苏州长风航空电子有限公司 | A kind of armoured thermocouple high temperature solder brazing protective agent and preparation method thereof |
| CN107206549A (en) * | 2015-02-02 | 2017-09-26 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| CN108015453A (en) * | 2017-12-05 | 2018-05-11 | 河南科技大学 | A kind of nickel-base alloy submerged-arc welding sintered flux and preparation method and application |
| CN115365704A (en) * | 2022-10-24 | 2022-11-22 | 东北大学 | Low-thermal-expansion melting welding flux and preparation method and application thereof |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038486A (en) * | 1999-07-29 | 2001-02-13 | Kawasaki Steel Corp | Firing type flux for submerge arc welding with excellent moisture adsorption resistance and degradation resistance, and manufacturing method |
| JP2002331389A (en) * | 2001-04-27 | 2002-11-19 | Kobe Steel Ltd | Backing flux for one side welding |
| JP3549502B2 (en) * | 2001-07-24 | 2004-08-04 | 株式会社神戸製鋼所 | Bond flux for submerged arc welding and method for producing the same |
| JP3788757B2 (en) * | 2001-10-02 | 2006-06-21 | 株式会社神戸製鋼所 | Bond flux for submerged arc welding |
| JP2003245794A (en) * | 2002-02-26 | 2003-09-02 | Jfe Steel Kk | Manufacturing method for sintered flux for submerged arc welding |
| JP3747321B2 (en) * | 2003-03-12 | 2006-02-22 | 株式会社神戸製鋼所 | Slag regeneration flux |
| JP3816070B2 (en) | 2003-09-16 | 2006-08-30 | 株式会社神戸製鋼所 | Titanya flux cored wire |
| CN100451142C (en) * | 2005-09-30 | 2009-01-14 | 池州市金山矿业有限公司 | Production and producing apparatus for automatic submerged-arc flux |
| KR100860556B1 (en) * | 2007-06-20 | 2008-09-26 | 한국산업기술대학교산학협력단 | Activating flux powder to be used for welding structural materials stainless steel, carbon steel and producing method thereof |
| CN103192196B (en) * | 2013-04-26 | 2015-09-09 | 宝鸡石油钢管有限责任公司 | A kind of fast sintered flux of high tenacity height weldering being applicable to the submerged arc welding of X90/X100 ultra high-strength pipeline steel pipe |
| CN103753046A (en) * | 2014-01-15 | 2014-04-30 | 四川大西洋焊接材料股份有限公司 | Welding flux for carbon steel submerged arc strip surfacing and preparation method for welding flux |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181796A (en) * | 1981-04-28 | 1982-11-09 | Mitsubishi Heavy Ind Ltd | Reproducing method of latent arc welding slag |
| JPS63188493A (en) * | 1987-01-29 | 1988-08-04 | Nippon Steel Weld Prod & Eng Co Ltd | Method for regenerating flux for submerged arc welding |
| JPH0927694A (en) * | 1995-07-12 | 1997-01-28 | Tdk Corp | Magnetic shield material and manufacture thereof |
-
1998
- 1998-04-30 JP JP12147098A patent/JP3392347B2/en not_active Expired - Lifetime
- 1998-10-15 TW TW87117141A patent/TW425325B/en not_active IP Right Cessation
- 1998-10-19 KR KR1019980043663A patent/KR100322395B1/en active IP Right Grant
- 1998-10-20 CN CN98125059A patent/CN1116147C/en not_active Expired - Lifetime
- 1998-10-20 ID IDP981389A patent/ID21113A/en unknown
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219509B (en) * | 2008-01-30 | 2010-11-03 | 李涛 | High-carbon high-alloy buried arc automatic weld deposit welding flux |
| CN102451962A (en) * | 2010-10-26 | 2012-05-16 | 北京新风机械厂 | Stainless steel active rosin flux and preparation method thereof |
| CN103223562A (en) * | 2012-01-27 | 2013-07-31 | 株式会社神户制钢所 | Solder for single-surface submerged-arc welding |
| CN103223562B (en) * | 2012-01-27 | 2016-02-10 | 株式会社神户制钢所 | One side solder flux used for submerged arc welding |
| CN107206549A (en) * | 2015-02-02 | 2017-09-26 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| CN107206549B (en) * | 2015-02-02 | 2019-08-09 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| CN105057922A (en) * | 2015-09-15 | 2015-11-18 | 武汉天高熔接股份有限公司 | Large-fusion-depth submerged-arc welding sintering welding flux |
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| CN106736045B (en) * | 2016-12-07 | 2019-09-13 | 苏州长风航空电子有限公司 | A kind of protectant preparation method of armoured thermocouple high temperature solder brazing |
| CN108015453A (en) * | 2017-12-05 | 2018-05-11 | 河南科技大学 | A kind of nickel-base alloy submerged-arc welding sintered flux and preparation method and application |
| CN115365704A (en) * | 2022-10-24 | 2022-11-22 | 东北大学 | Low-thermal-expansion melting welding flux and preparation method and application thereof |
| CN115365704B (en) * | 2022-10-24 | 2022-12-23 | 东北大学 | Low-thermal-expansion melting welding flux and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW425325B (en) | 2001-03-11 |
| ID21113A (en) | 1999-04-22 |
| JPH11188496A (en) | 1999-07-13 |
| CN1116147C (en) | 2003-07-30 |
| JP3392347B2 (en) | 2003-03-31 |
| KR100322395B1 (en) | 2002-04-17 |
| KR19990037201A (en) | 1999-05-25 |
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